A short story idea

An unreliable narrator has a lucid dream where he goes back in time and gets in a drunken sword-fight with Ronald Reagan on the set of "Bedtime for Bonzo" only the chimp gets killed. Upon waking up back in the present, it turns out that his dream actually happened and Reagan's career never recovered from this setback. Armed with the knowledge that he can make his dreams reality, he goes back to sleep only to get stuck in the universe of some television show, True Blood or Mad Men probably. That's about it.